Local Heat-Transfer Coefficients on Surface of an Elliptical Cylinder, Axis Ratio 1:3, in a High-Speed Air Stream

Local heat-transfer coefficients and thermal-recovery factors from a 1:3-axis-ratio elliptical cylinder to air are presented for angles of attack of +6 deg, 0 deg, and −6 deg with reference to the wind-tunnel center line. Air speeds ranged from 150 to 440 fps, yielding Reynolds numbers based on the major axis of the cylinder of 4.34 × 10⁵ to 1.28 × 10⁶. The heat transfer was measured experimentally for the primary purpose of providing results which would be a basis for a check of the approximate methods for predicting the heat transfer in the laminar-boundary-layer region. This check has been made for one method of prediction with satisfactory results for the various flow geometries.